From: Dave Chinner <david@fromorbit.com>
To: Christoph Hellwig <hch@infradead.org>
Cc: xfs@oss.sgi.com
Subject: Re: [PATCH] mkfs: add discard support
Date: Wed, 7 Oct 2009 15:42:16 +1100 [thread overview]
Message-ID: <20091007044215.GK9464@discord.disaster> (raw)
In-Reply-To: <20091006184758.GA4780@infradead.org>
On Tue, Oct 06, 2009 at 02:47:58PM -0400, Christoph Hellwig wrote:
> Call the BLKDISCARD ioctl to mark the whole disk as unused before creating
> a new filesystem. This will allow SSDs, Arrays with thin provisioning support
> and virtual machines to make smarter allocation decisions.
Good idea, but perhaps the discard should be optional rather than
unconditional. My immediate thought was the SOP for setting up
encrypted devices - fill the empty disk with random data before
setting up the encrypted device. If you then send it a discard....
Cheers,
Dave.
--
Dave Chinner
david@fromorbit.com
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next prev parent reply other threads:[~2009-10-07 4:40 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-10-06 18:47 [PATCH] mkfs: add discard support Christoph Hellwig
2009-10-07 4:42 ` Dave Chinner [this message]
2009-10-07 6:05 ` Michael Monnerie
2009-10-07 14:11 ` Christoph Hellwig
2009-10-07 20:24 ` Andi Kleen
2009-10-09 2:30 ` Dave Chinner
2009-10-10 4:22 ` Andi Kleen
2009-10-10 16:24 ` Christoph Hellwig
2009-10-12 1:33 ` Andi Kleen
2009-10-07 22:26 ` [PATCH v2] " Christoph Hellwig
2009-10-10 20:55 ` Eric Sandeen
[not found] <1235789111.21721254856913943.JavaMail.root@mail-au.aconex.com>
2009-10-06 19:24 ` [PATCH] " Nathan Scott
2009-10-06 19:26 ` Christoph Hellwig
2009-10-07 1:18 ` Christoph Hellwig
2009-10-07 1:20 ` Nathan Scott
2009-10-07 3:55 ` Eric Sandeen
2009-11-12 16:04 ` Christoph Hellwig
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